A spokesman for Greater Manchester Police said: "There have been some arrests for public order offences.

"The protest has been fairly peaceful, but the group were warned under the Public Order Act to move on and clear the site."

Police were also called to the Manchester Art Gallery after reports protestors entered a private function, but no arrests were made.

Supporters are concerned about the level of debt involved in Glazer's bid and fear for the club's future.

Oliver Houston, vice chairman of Shareholders United, told BBC Radio Five Live that Glazer is "no Roman Abramovich".

Chelsea's Russian billionaire owner, Abramovich, has invested over £200m on players since taking over, bankrolling the club to the Premiership title this season.

Houston predicted an entirely different scenario at United.

He said: "He's not turning up with a suitcase full of his own cash.

"He is, in effect, asking Manchester United fans to pay for his takeover, to pay for increased ticket prices and increased merchandising."

If Glazer does get control, we will up sticks and form a new club

Jules Spencer, Independent Manchester United Supporters Association

Shareholders United, which represents 17% of the club's stockholders, still hopes to prevent Glazer reaching the 75% level of shares he needs to make his offer unconditional - and essentially own the club.